Pico power consumption down to 0.02mA

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MSol
Hi Gordon,
thanks for your comments!

..the multimeter was not changed, just mentioned it. In tests nr.2.x and later the InAir9b module was disconnected from all pins of PICO.

It helps!!!
```
// test 3.3b: 24uA
digitalWrite([B15,B14,B13,B10,B1,A7,A6,A5,A4,A3,A2,A1,A0,A10,B9,B8,A8,B7,B6,B5,B4,B3],1);
```
instead of
```
// test 3.3: 68uA
digitalRead([B15,B14,B13,B10,B1,A7,A6,A5,A4,A3,A2,A1,A0,A10,B9,B8,A8,B7,B6,B5,B4,B3]);
```
Unfortunately:
1) my tests results (e.g. 1.1 and 1.2) have a little differ. Probably, on the reason of battery voltage is down from test to test;
2) there is pure test, i.e. without radio module, sensors and another loads on PICO pins. How to reach the same result in case of many PICO pins are connected?

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